Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Northfield	Empire City Transaction	Park MGM	MGM Springfield	Class A Shareholders MGM Growth Properties LLC	MGP BREIT Venture	Empire City	Common Stock	Common Stock Empire City	Capital in Excess of Par Value	Capital in Excess of Par Value Northfield	Capital in Excess of Par Value Empire City Transaction	Capital in Excess of Par Value Park MGM	Capital in Excess of Par Value MGM Springfield	Capital in Excess of Par Value Class A Shareholders MGM Growth Properties LLC	Capital in Excess of Par Value MGP BREIT Venture	Capital in Excess of Par Value Empire City	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Northfield	Accumulated Other Comprehensive Income (Loss) Empire City Transaction	Accumulated Other Comprehensive Income (Loss) Park MGM	Accumulated Other Comprehensive Income (Loss) Class A Shareholders MGM Growth Properties LLC	Accumulated Other Comprehensive Income (Loss) MGP BREIT Venture	Total MGM Resorts International Stockholders' Equity	Total MGM Resorts International Stockholders' Equity Northfield	Total MGM Resorts International Stockholders' Equity Empire City Transaction	Total MGM Resorts International Stockholders' Equity Park MGM	Total MGM Resorts International Stockholders' Equity MGM Springfield	Total MGM Resorts International Stockholders' Equity Class A Shareholders MGM Growth Properties LLC	Total MGM Resorts International Stockholders' Equity MGP BREIT Venture	Total MGM Resorts International Stockholders' Equity Empire City	Noncontrolling Interests	Noncontrolling Interests Northfield	Noncontrolling Interests Empire City Transaction	Noncontrolling Interests Park MGM	Noncontrolling Interests MGM Springfield	Noncontrolling Interests Class A Shareholders MGM Growth Properties LLC	Noncontrolling Interests MGP BREIT Venture
Beginning Balance (in shares) at Dec. 31, 2018									527,480
Beginning Balance at Dec. 31, 2018	$ 10,469,791								$ 5,275		$ 4,092,085								$ 2,423,479	$ (8,556)						$ 6,512,283								$ 3,957,508
Net income (loss)	2,205,287																		2,049,146							2,049,146								156,141
Currency translation adjustment	28,870																			16,125						16,125								12,745
Cash flow hedges	(29,505)																			(19,973)						(19,973)								(9,532)
Stock-based compensation	88,838										83,897															83,897								4,941
Issuance of common stock pursuant to stock-based compensation awards (in shares)									2,150
Issuance of common stock pursuant to stock-based compensation awards	(25,965)								$ 20		(25,985)															(25,965)
Cash distributions and dividend payable to noncontrolling interest owners	(181,816)					$ (53,489)																												(181,816)					$ (53,489)
Dividends declared and paid to common shareholders	(271,288)																		(271,288)							(271,288)
Issuance of restricted stock units	1,546										1,546															1,546
Repurchases of common stock	(1,031,534)								$ (358)		(1,031,176)															(1,031,534)
Repurchases of common stock (in shares)									(35,854)
Adjustment of redeemable noncontrolling interest to redemption value	(2,714)										(2,714)															(2,714)
Empire City acquisition (in shares)										9,372
Empire City acquisition								$ 265,765		$ 94								$ 265,671															$ 265,765
Transaction		$ (5,760)	$ 5,027	$ 528								$ 21,681	$ (18,913)	$ (1,984)							$ (2)	$ 195	$ 16				$ 21,679	$ (18,718)	$ (1,968)						$ (27,439)	$ 23,745	$ 2,496
MGP Class A share issuance	1,512					1,201,558										$ 150,464								$ 1,512							$ 151,976								1,049,582
Other	(2,220)										(3,473)									481						(2,992)								772
Ending Balance (in shares) at Dec. 31, 2019									503,148
Ending Balance at Dec. 31, 2019	12,662,919								$ 5,031		3,531,099								4,201,337	(10,202)						7,727,265								4,935,654
Net income (loss)	(1,326,125)																		(1,032,724)							(1,032,724)								(293,401)
Currency translation adjustment	27,762																			15,711						15,711								12,051
Cash flow hedges	(79,365)																			(44,528)						(44,528)								(34,837)
Stock-based compensation	106,956										100,907															100,907								6,049
Issuance of common stock pursuant to stock-based compensation awards (in shares)									2,031
Issuance of common stock pursuant to stock-based compensation awards	(16,403)								$ 21		(16,424)															(16,403)
Cash distributions and dividend payable to noncontrolling interest owners	(221,690)					(64,086)																												(221,690)					(64,086)
Dividends declared and paid to common shareholders	(77,606)																		(77,606)							(77,606)
Issuance of restricted stock units	2,142										2,142															2,142
Repurchases of common stock	(353,720)								$ (109)		(353,611)															(353,720)
Repurchases of common stock (in shares)									(10,861)
Adjustment of redeemable noncontrolling interest to redemption value	35,520										35,520															35,520
Transaction	(59)						$ 1,725										$ (6,503)								$ (59)							$ (6,562)								$ 8,287
MGP Class A share issuance	646					507,551										64,188								646							64,834								442,717
Redemption of Operating Partnership units	(22,292)										83,859									8,773						92,632								(114,924)
Other	(3,380)										(1,724)									(1,018)						(2,742)								(638)
Ending Balance (in shares) at Dec. 31, 2020									494,318
Ending Balance at Dec. 31, 2020	11,179,908								$ 4,943		3,439,453								3,091,007	(30,677)						6,504,726								4,675,182
Net income (loss)	1,198,577																		1,254,370							1,254,370								(55,793)
Currency translation adjustment	(24,655)																			(13,871)						(13,871)								(10,784)
Cash flow hedges	34,788																			13,723						13,723								21,065
Stock-based compensation	65,183										59,492															59,492								5,691
Issuance of common stock pursuant to stock-based compensation awards (in shares)									2,574
Issuance of common stock pursuant to stock-based compensation awards	(44,518)								$ 25		(44,543)															(44,518)
Cash distributions and dividend payable to noncontrolling interest owners	(250,910)					(82,294)																												(250,910)					(82,294)
Dividends declared and paid to common shareholders	(4,789)																		(4,789)							(4,789)
Repurchases of common stock	(1,753,509)								$ (430)		(1,753,079)															(1,753,509)
Repurchases of common stock (in shares)									(43,088)
Adjustment of redeemable noncontrolling interest to redemption value	(78,298)										(78,298)															(78,298)
Transaction					$ 38,905										$ (133,844)															$ (133,844)								$ 172,749
MGP Class A share issuance	3,240					$ 759,535										$ 99,934								$ 3,240							$ 103,174								$ 656,361
Redemption of Operating Partnership units	(50,828)										171,332									5,327						176,659								(227,487)
Other	(10,329)										(10,312)									(2,358)						(12,670)								2,341
Ending Balance (in shares) at Dec. 31, 2021									453,804
Ending Balance at Dec. 31, 2021	$ 10,976,766								$ 4,538		$ 1,750,135								$ 4,340,588	$ (24,616)						$ 6,070,645								$ 4,906,121